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Question

Which has more atoms:100g of N2or 100g of NH3?

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Solution

(i) 100g N2 contains =10028 moles
Number of molecules=10028×6.022×1023
Number of atoms=10028×6.022×1023×2=43.01×1023
(ii) 100g NH3=10017
=10017×6.022×1023
=10017×6.022×1023×4
=141.69×1023
NH3would have more atoms

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